--  @testpoint:opengauss关键字else(保留)，作为函数名

--关键字不带引号-失败
drop function if exists else;
create function else(i integer)
returns integer
as $$
begin
    return i+1;
end;
$$ language plpgsql;
/

--关键字带双引号-成功
drop function if exists "else";
create function "else"(i integer)
returns integer
as $$
begin
    return i+1;
end;
$$ language plpgsql;
/
drop function "else";

--关键字带单引号-合理报错
drop function if exists 'else';
create function 'else'(i integer)
returns integer
as $$
begin
    return i+1;
end;
$$ language plpgsql;
/
--关键字带反引号-合理报错
drop function if exists `else`;
create function `else`(i integer)
returns integer
as $$
begin
    return i+1;
end;
$$ language plpgsql;
/